JPS61218242A - Aggregated wiring device - Google Patents

Abstract

PURPOSE:To miniaturize an aggregated wiring system by using a CCU to process many inputs being in AND condition existing in an automobile and inputs being in OR relation by means of software. CONSTITUTION:A control section consists of a synchronizing circuit 61 synchronizing reception data of a line 68 with a clock, a control circuit 62 using the said clock to apply control of shift of a shift register, control of interruption and transmission error control of data, and an address comparator 63 comparing the address given from a line 67 with an address representing destination included in the reception data. The interface section consists of a shift register 64 applying serial/parallel conversion, an A/D converter control circuit 65 controlling an A/D converter 3 for serial input/output and an input/output buffer whose input/output is changed by the address input of a line 67 and connected to the input/output interface 4. Thus, the relation between the output and input is controlled in terms of the software at each time.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a multiplex signal transmission system, and in particular, a load control method for an integrated wiring system in an automobile [Background of the Invention] An automobile has various lamps, motors, actuators, Many electrical components such as sensors are installed, and the number is increasing.

In current automobiles, these electrical components are individually wired. For this reason, bundles of electric wires (so-called wire harnesses) have become complex and large-scale as the number of electrical components increases, and this has become a major problem. In other words, increased costs.

These include an increase in weight and a decrease in wiring space. moreover.

Due to recent advances in car electronics. As more and more electronic devices such as microcomputers are installed, the signals propagated through wire harnesses are not only simple 0N10FF signals, but also contain a lot of complex data, and data can be distorted due to noise. There is also the danger that it may reverse and cause malfunction.

Pa3.

V. One method to solve these problems is to apply multiplex signal transmission technology, which has already been established in the field of communications, to automobiles, and transmit a large number of signals with a small number of wires. is proposed.

In such signal transmission systems, as a transmission line.

Optical fiber cables are often used because they are lightweight and non-inductive. For example, there is Japanese Patent Application Laid-Open No. 55-105490.

By the way, there are some cars in which inputs and outputs do not have a one-to-one correspondence and do not operate unless multiple inputs are turned on (hereinafter referred to as AND-related inputs), and some cars do not have a one-to-one correspondence between inputs and outputs, and do not operate unless multiple inputs are turned on (hereinafter referred to as AND-related inputs). There are those that operate when one input is turned on (hereinafter referred to as OR-related inputs), and those that operate when one input is turned on.

The first example is rear defogger and fog lamps. The rear defogger does not operate unless the rear defogger switch is turned on when the key switch IGN is turned on. Fog lamps only come on when the lighting switch is on.

The second OR, many of which can be lit.
Related inputs include room lamps, parking lamps, hazard warnings, etc. A third example is a lighting switch, a hazard warning switch, etc. FIG. 2 shows an example of wiring for a room lamp and a defogger. One end of the room lamp 95 is connected to the ten terminal of the battery 90, and the other end is connected to door switches 91 and 92 installed in each door. The rear defogger includes a key switch 93, a rear defogger switch 94, and a rear defogger 96 connected in series. Methods for realizing these in the above-mentioned aggregated wiring system include a hardware method and a software method, but the hardware method requires AND or OR of a plurality of inputs.

Wires must be routed from switches, etc., which halves the benefits of introducing an integrated wiring system. Therefore, it is necessary to realize the relationship between these inputs and loads using software. Furthermore, it is desired to be able to easily deal with differences in bathing power scores due to differences in one model.

[Purpose of the invention]

The purpose of the present invention is to solve one problem based on the above background, to control one output by one person, AND-related inputs, OR-related inputs, and multiple outputs by one person using an integrated wiring system, and The object of the present invention is to provide a load control method that can easily respond to changes in the input/output relationship.

[Summary of the invention]

In order to achieve this object, the present invention is characterized in that the relationship between the output and input described above is controlled by software each time, and in particular, a table is used for this purpose.

[Embodiments of the invention]

Hereinafter, the integrated wiring device according to the present invention will be explained in detail with reference to illustrated embodiments.

FIG. 1 is an actual wiring diagram showing an embodiment of an integrated wiring system according to the present invention mounted on an actual vehicle.

CCUl and terminal control unit (hereinafter referred to as LCU) 11-1
7 is connected with optical fiber 2, and CCU1 is connected to LC
Input the status of the switches etc. connected to U11-17, create control data for it, and
7 to control the load. The room lamp 95 is connected to the LCU 15, and the door switches 91 and 92 are connected to the LCUs 15 and 13, respectively. The key switch 93 is connected to the LCU 13, and the rear defogger switch 94
is connected to the LCU 14, and the rear defogger 96 is connected to the LCU 17. When the CCU1 receives from the LCU 13 that the door switch 92 is ON or that the door switch 91 is ON from the LCU 15, it transmits data to turn on the room lamp 95 to the LCU 15. In the case of Riyadefotsuga.

ACC and I of key switch 93 from LCU13,14
GN is ON and rear defogger switch 94 is ON.
Only when received.

Sends data to operate the rear defogger to the LCU 17. In current cars, the rear defogger can operate as long as the key switch IGN is ON, but if you use an integrated wiring system, you can easily AND the ACC and IGN rear defogger switches. , it is possible to prevent wasteful power consumption when starting the engine, and it is possible to turn the starter etc. vigorously. In addition, the second
The figure shows part of the wiring using a conventional wire harness for reference.

FIG. 3 is a block diagram showing an example of the configuration of the CCU and LCU. This is because the CCU requires a high degree of judgment processing ability. It has a microcomputer 5. The signal transmission control circuit (hereinafter referred to as C/M) 6 is. Converts parallel control data generated by a microcomputer into serial control data and transmits it. In addition, the received data is serial/parallel converted and error-free data is received. It has a function of outputting an interrupt request to the microcomputer 5. The CCU has a multiplexer 8. for selecting which LCU to transmit with. It is composed of photoelectric converters 21 to 23 that perform optical/electrical conversion, and a memory device 9 that stores received data, transmitted data, and the like.

On the other hand, LC:U is the photoelectric converter 24. CIM7゜I/O interface 4. It is composed of an A/D converter 3 and the like, and analog sensors 121 to 122 . Digital input/output 111~
It is connected to 112.

FIG. 4 shows one important component in the centralized wiring system. FIG. 2 is a block diagram showing a circuit configuration of a CIM. C
The IM can be roughly divided into a control section and an interface section. The control section includes a synchronization circuit 61 that synchronizes the received data on line 68 and a clock, and control 2 of the shift operation of the shift register using this clock. 2 Interrupt-related control (CC
control circuit 62 for controlling data transmission errors (when used within U) and data transmission error control. It consists of an address comparator 63 that compares the address given from line 67 with the address included in the received data indicating the destination. The interface section includes a shift register 64. which performs serial/parallel conversion. A that controls the serial input/output A/D converter 3
/D converter control circuit 65. The input/output direction changes depending on the address input on the line 67, and the input/output buffer 66 is connected to the input/output interface 4. Upon receiving data from line 68, shift register 64
is converted to parallel data. During reception, a check is made for transmission errors, and when reception is complete, the address input from line 67 is compared with the address in the received data, and if there is no abnormality in both, the received data is transferred to human output buffer 66. External digital input/output 113-11
Controls the output part of 5. On the other hand, when sending data.

The data in the A/D converter control circuit 65 and the data in the input/output buffer 66 are transferred to the shift register 64,
A shift clock generated by control circuit 62 is transmitted from line 69 toward CCU. In addition, this figure 4 shows the C when used in the LCU and handles analog data.
Although the IM is shown, the CIM can be used as a CIM that handles only digital input/output within the LCU, or as a CIM that interfaces with a microcomputer within the CCU, depending on the address given from line 67.

FIG. 5 is a state transition diagram of the CIM when used within the LCU. When a reset is applied, it goes into an idle state,
Waiting for data reception. Now, when we receive the start bit at the beginning of the data.

It moves to the reception state, and while receiving data, checks for transmission errors and addresses. If there is an error, it returns to the idle state and waits for the reception of the primary data. If there is no error, the process moves to zero transmission and transmits 0'', the number of bits required for transmission error detection.

Send the transmit data in the next transmit state, return to idle,
One transmission ends.

FIG. 6 is a state transition diagram of the CIM when used within the CCU. First, it is reset and in an idle state. here. Transmission is started when the microcomputer writes data to the shift register 64 in the CIH. Transitions from idle to zero transmission, to transmission, transmits data, returns to idle, and waits to receive reply data to the transmitted data. When the reply data is received, it changes to the receiving state. If there is a transmission error, it returns to idle.

In the CIM in the CCU, since the received data is a response to the transmitted data, no address check is performed.

When error-free data is received, it sets an interrupt request flag for the microcomputer, returns to idle, and returns to 1.
transmission ends.

Interrupt requests can also be masked by software.

FIG. 7 is a flowchart of a control method in an aggregate wiring system having such a CCU and LCU and having a star network configuration as shown in FIG. In the main routine, first, the memory, timer, etc. are initialized, and transmission is started, that is, data is sent to the first CIM.

After starting transmission, the transmission table that stores transmission data is repeatedly updated. Processing of received data with respect to transmitted data is performed by an IRQ routine. C.I.M.
Control is transferred to the IRQ routine based on the interrupt request flag output when the data is received. In the IRQ routine, the received data is taken in, stored in the reception table, and then sent to the next C
The data is received in the IM and the IRQ routine returns to the main routine. If data is being transmitted normally, the central wiring system will function with just the main routine and IRQ routine, but if for some reason there is an error in the transmitted or received data, the transmission will stop.
The timer interrupt routine prevents the transmission from being restarted. This is the C in the LCU.
Taking advantage of the fact that the time from IM receiving data to transmitting data is constant, set a timer longer than that time, and if the time from CCU transmitting matches the set time. , a timer interrupt routine is executed, and if data cannot be received from the same CIM twice in a row, a buzzer or lamp is activated as an alarm, and the data is sent to the next CIH and transmitted. The process continues.

FIGS. 8 and 7 show an example of a table CCTRL that stores the connection relationship between inputs and outputs used in the process of updating the transmission table in the main routine. Three bytes are allocated to indicate one connection relationship. The first byte contains the CI to which the input device is connected.
Contains the order in which M is transmitted. The second byte contains the order in which the output device is connected to the CIM to be transmitted. Further, bits 7 and 6 of the second byte contain information as to whether the input is an AND-related input or an OR-related input. The third byte has information on the number of the input/output terminals of the CIM in which the input device is connected in the upper 4 bits, and the information on the number in the input/output terminals of the CIM in the lower 4 bits. ing.

The switch connected to the input/output terminal 9 of the CIM transmitted indicates that the device connected to the input/output terminal 3 of the CIM transmitted fifth is to be operated. The output device connected to the
This indicates that it will not operate unless the ND condition is met.
The input connected to the input/output terminal 6 of the CIM that is transmitted first is one of them.

FIG. 9 is a flowchart of a routine for updating the transmission table using the table configured as shown in FIG. The method of updating the transmission table is to check the input status in order, and if it is "1", change the corresponding output to "1".
'', and if it is ``0'', then set it to ``0''.However, if there are many connection relationships between inputs and outputs, a problem arises in terms of response time.

For this reason, the routine in Figure 9 takes advantage of the fact that when an aggregated wiring system targets a general wiring system, the input often maintains its previous state and rarely changes. The presence or absence of a change is checked, and if there is a change, the state of the corresponding output is inverted. First, the reception table containing the latest data is compared with the transmission table containing the previous input state to check for changes in input. If there is no change, the reception table pointer is incremented by 1 and the process ends. If there is a change, in order to check whether there will be a next change, the input bit that has changed in the transmission table is inverted so that it matches the reception table.

Next, change the connection relationship for the changed input into CCTBL.
Find it and check the OR bit and AND bit.

If it is "1", the respective processing is performed.

0", the output bit of the transmission data is inverted based on the connection data found from the CCTBL. Since there is not necessarily one connection relationship between the output and the changed input, the connection relationship is again retrieved from the CCTBL. Find and perform the same processing if there is no connection data for the input that has changed in CCTBL.

If it does, advance the reception table pointer by 1 and exit.

FIG. 10 shows a method for processing OR-related inputs. This process requires the OR bit to be 1” in CCTRL.
0RTBL which collects only the connection relationships and makes a table
is used. The configuration of 0RTBL is the CCT in Figure 8.
In the RL configuration, set the OR bit and AND bit to 0.
”.

Focusing on the output for the input that has changed, search the connection data related to that output from 0RTBL, check the input state indicated by the connection data, and if it is '1', set the bit corresponding to the output device in the transmission table to '1'. If it is 'O', the next connection data is searched from 0RTBL and the same process is performed.

When the connection data for the output cannot be found from 0RTBL, the bit corresponding to the output device in the transmission table is set to "0" and the process ends.

FIG. 11 is a flowchart of a routine for processing AND-related inputs. This is done in the input processing routine for the OR relationship shown in FIG.

It is almost the same as replacing “1” and “O”, and the connection data corresponding to the changed input (in CCTBL)
Focusing on the output light of , the input that is in an AND relationship is searched for from ^NDTBL, and it is checked whether the value is "O" or not. If even one input is "0", 0" is written in the transmission table, and only when all inputs are "1", 1'1" is written in the transmission table.

〔Effect of the invention〕

According to the integrated wiring system according to the present invention, the processing of the many AND-related inputs and OR-related inputs that exist in a car is performed by software in the CCU, so it is not necessary to use remote switches. However, it is only necessary to connect each to the nearest LCU, and this can be realized without adding any hardware, so the integrated wiring system can be downsized. Furthermore, since these controls can be performed using a control method using tables, differences in input/output connection relationships due to changes in one model can be easily accommodated by simply changing the table.

[Brief explanation of the drawing]

Fig. 1 is an actual diagram of the integrated wiring system of the present invention installed in an actual vehicle, Fig. 2 is an explanatory diagram showing an example of a wiring configuration using a conventional wire harness, and Fig. 3 is an example of the arrangement of an integrated wiring system. Block diagram showing. Figure 4 is a circuit configuration diagram of CIM, Figures 5 and 6 are CIM
7 is a flowchart for explaining the operation,
Figure 8 is for explanation showing the configuration for CCTRLCTR;
10 and 11 are flowcharts for explaining the operation. 1...CCU, 2...Optical fiber, 3...A/D
converter. 4... Input/output interface, 5... Microcomputer, 6, 7... CIM, 8... Multiplexer, 9... Memory device, 21-24... Photoelectric conversion device. 61... Synchronous circuit, 62... Control circuit, 63...
Address comparator, 64...Shift register, 65...
- A/D converter control circuit, 66... input/output buffer.

Claims (3)

[Claims] 1. It has a microcomputer and is connected to a central control unit that monitors the system, collects data, creates and sends data, and switches, sensors, motors, etc., and receives data sent from the central control unit. The controller is comprised of a terminal control device and a multiplex signal transmission line, which has the function of controlling motors based on the received data and transmitting data from the switches and sensors to the central control device. The integrated wiring system is characterized by providing control means for an AND relationship input and an OR function input in which any one of a plurality of inputs corresponds to one output of either the central control device or the terminal control device. Centralized wiring device. 2. The integrated wiring device according to claim 1, wherein the control means is configured by software. 3. In claim 2, the software is configured to include a table search in which information related to the AND relationship input, information related to the OR relationship input, and information related to inputs other than these are described. An integrated wiring device characterized by: